.45 Colt is great in strong revolvers when loaded to standard factory power or greater (up to +P type loads). For low power loads like CAS loads, you have a great deal of empty space in the case. That makes for inconsistency at best. The .45 ACP and .45 AR cases are much smaller and can be loaded with light range loads more consistently than the Colt case, and they can handle loads up to the standard factory .45 Colt loads.
In S&W N frame revolvers, you don’t get much with a .45 Colt that you can’t do with the .45 AR due to the strength and durability of the gun.
In the Ruger Blackhawks, you can get a .45 ACP cylinder, but without modification, .45 AR won’t work. Currently, in you want to shoot a rimmed, short .45, you have two choices: use rimmed .45 Cowboy cases which are .45 ACP case size with a .060” thick rim, same as the .45 Colt, or you can have the cylinder trimmed to allow the use of the .089” thick rims on .45 AR cases.
I had several .45 NMBHs with .45 ACP cylinders trimmed for use of .45 AR. Now I can use the same loads in my NMBH as I use in my 625-8JM. I don’t have to fool around with moon clips and I don’t have to pick .45 ACP cases out with my finger nails, but I retain the capability to use the .45 ACP with both guns.